The phrase "to watch the action" means to observe or pay attention to what is happening in a situation or event.
Sentences with «to watch the action»
While your friends watch action movies on TV, wouldn't you prefer being part of the action? (mmogames.com)
Visitors are welcome to stand on the beach and watch the action unfold. (mauiinn.com)
As a seller watching the action on their listing video, they might notice a comment about the price, a comment about the clutter or that it has a small backyard. (remonline.com)